Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
someone who
Grammar usage guide and real-world examplesUSAGE SUMMARY
"someone who" is correct and usable in written English.
You can use "someone who" when referring to a person who has certain characteristics or has completed a certain action. For example, "I'm looking for someone who is passionate about helping others."
✓ Grammatically correct
News & Media
Wiki
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
Ask someone who did".
News & Media
Someone who "matches us"?
News & Media
"Someone who is authentic.
News & Media
Someone who can win.
News & Media
Someone who travels.
News & Media
Someone who cared.
News & Media
Someone who wears glasses?
News & Media
"He's someone who is flaring.
News & Media
A. Someone who seeks responsibility.
News & Media
"I'm not someone who works.
News & Media
Someone who can come over?
News & Media
Expert writing Tips
Best practice
When using "someone who", ensure that the relative clause following "who" clearly and concisely defines the characteristic or action you're attributing to that person. This helps avoid ambiguity and strengthens the sentence's overall clarity.
Common error
Avoid using "that" in place of "who" when referring to people. "Who" is the correct relative pronoun for individuals. For example, use "someone who cares" instead of "someone that cares".
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "someone who" functions as a relative clause, introducing additional information about an unspecified person. It serves to qualify or describe the individual being referenced, as confirmed by Ludwig and demonstrated in various examples.
Frequent in
News & Media
65%
Wiki
30%
Formal & Business
5%
Less common in
Science
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "someone who" is a versatile and commonly used phrase that introduces a relative clause to describe an unspecified person based on particular characteristics or actions. As Ludwig AI confirms, it's grammatically correct and widely accepted across various writing styles. Predominantly found in News & Media and Wiki sources, the phrase serves to qualify individuals, making it a crucial tool for clear and effective communication. When using "someone who", focus on defining the characteristic or action concisely to avoid ambiguity. Remember to use "who" instead of "that" when referring to people for grammatical correctness.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
a person that
Substitutes "someone" with "a person", offering a slightly more formal and direct tone.
an individual that
Replaces "someone" with "an individual", adding a touch of formality and emphasizing the person's distinct identity.
the one that
Adds specificity and emphasis, suggesting a unique or particularly suitable individual.
anyone that
Changes the focus to a broader, non-specific group of people, implying inclusivity.
a man who
Specifies a male subject, providing a more direct and gender-specific reference.
a woman who
Specifies a female subject, offering a more direct and gender-specific reference.
a party who
This alternative uses "party" instead of "someone", typically employed in legal or formal contexts to denote an involved individual or entity.
a being that
Replaces "someone" with "a being", suggesting a broader, more existential perspective on the person.
he who
Utilizes a more archaic or literary construction, lending a sense of timelessness or gravity.
she who
Mirrors the previous alternative but specifies a female subject, maintaining the same archaic or literary tone.
FAQs
How can I use "someone who" in a sentence?
Use "someone who" to describe a person based on a particular characteristic or action they perform. For instance, "I need "someone who is reliable"" indicates you are looking for a dependable person.
What are some alternatives to "someone who"?
Depending on the context, you can use alternatives like "a person that", "an individual who", or "anyone who". These phrases provide similar meanings but might vary slightly in formality or emphasis.
Is it ever correct to say "someone that" instead of "someone who"?
While "that" can sometimes be used as a relative pronoun, it's generally preferred to use "who" when referring to people. Using "someone who" is considered more grammatically correct and formal in most contexts.
What's the difference between "someone who" and "anyone who"?
"Someone who" refers to a specific, though unidentified, individual. "Anyone who" refers to any person that meets the criteria described, implying a broader, non-specific group.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested